Nut-tapping machine



(No Model.) 3 Sheets-Sheet 1.

' R.G..MAROY.

NUT TAPPING MACHINE No. 582,536. 7 Patented May 11,1897.

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whey/m1 3 ShetsSheet 2.

R. G MAROY.

Patented May 11, 1 897.

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(No Model.) 3 Sheets-Sheet 3.

B. G. MARGY. NUT TAPPING MACHINE.

1%.- 582,536. I Patented May 11, 1897.

UNITED STATES WATENT FFICE.

. RUFUS G. MAROY, OF KENDALLVILLE, INDIANA.

NUT-TAPPING MACHINE.

SPECIFICATION forming part of Letters Patent No. 582,536, dated May 11,1897. Application filed August 28, 1896- Serial No. 604,188. (No model.)

To all whom it may concern..-

Beit known that I, RUFUS G. MAROY, a citizen of the United States,residing at Kendallville, in the county of Noble and State of Indiana,have invented new and useful Improvement-s in Gang Nut-Tapping Machines,of which the following is a specification.

This invention relates, primarily, to gang nut-tappin g machines, butalso comprises features that are applicable as well to other purposes,as in drilling or boring machines.

The invention consists in the novel construction and combination ofdevices in machines for tapping, drilling, or boring, as hereinaftermore particularly described and claimed.

In the annexed drawings, Figure 1 is a sectional elevation of a gangnut-tapping machine, illustrating my improvements, but showing only twotapping-spindles, one in operation and one at rest. Fig. 2 is anelevation of the same at a right angle to the preceding figure andshowing six spindles. Fig. 3 is a plan of the machine.

The frame of the machine may comprise an annular basin 1, elevated onlegs 2 and inclos'ing a spider or socket plate 3, inwhich is stepped astationary central standard or column 4, from which the principaloperative parts of the machine are supported. If preferred, however, thefoundation for the machine might be formed by a heavy floor-plate, towhich the standard or column 4 could be secured.

Above the annular basin 1 there is secured at a suitable point on thestandard 4 a spiderframe 5, and a somewhat similar spider'frame 6 issecured by means of a socketed hub 7 to the top of said column orstandard.

As shown in Fig. 1, the hub 7 of the upper spider-frame 6 may supportthe hub 8 of a horizontally-arranged bevel-gear 9, havingits axle orjournal 10 formed by a vertically-arranged bolt that is secured in thehub of the upper spider-frame. In the spider-frame 6 is journaled ashort horizontal shaft 11, provided-with fast and loose pulleys 12 forbelting to a line-shaft or counter-shaft, as most convenient. Thepulley-shaft 11 carries a bevel-pinion 13, that meshes with and drivesthe horizontal bevel-gear 9, on the hub of which is secured a largefriction-wheel 14,

that transmits power through smaller friction-wl1eels'15 to a gang ofrotatable and vertically-sliding spindles 16, as presently explained.These spindles 16 are provided at their lower ends with chucks 17 forholding the taps 18 or other tools required.

The friction-wheels 14 and 15 may be faced with leather or otherappropriate frictional material, or, as shown in Fig. 1, the smallerfriction-wheels 15 may be made up from superposed leather disks clampedonto a central tubular core or hub 19, which is preferably extended forsome distance below the wheel-body. If desired, friction wheels or disksof paper or wood pulp may be employed. It is intended that the spindles16 shall have a vertically-sliding movement in or through theirfriction-wheels 15 as well as to be capable of rotation therewith. Forthis purpose the inner portion of each hub 19 may be provided with afeather, key, or spline engaging a groove or way in the spindle 16 ofsufficient length to allow said spindle the required vertical movementwithout conflicting with its rotation.

It will be obvious that the size of the friction-wheels 15 may bevaried, with suitable changes in the arrangement of the correspondingspindles 16 in their supports, so as to permit variation in the speedand power of the spindles according to differing requirements in theoperation of nut-tapping, as for large or small nuts. Thus thefriction-wheels 15 may differ in size, as required, some being largerand some smaller, according to varying requirements of the work.

The lower portionof each friction-wheel hub 19 is loosely received in abox or sleeve 20, that is pivotally connected with lugs 21 on the upperspider-frame 6 by means of links 22, that form a toggle-joint with saidlugs, and when the spindles 16 are at'work, as by engagement betweenfriction-wheels 14 and 15, the said links 22 will stand on an incline ofabout thirty degrees. A nut 23 on the lower end of the wheel-hub 19holds the box or sleeve 20 in such position that it will, not bind ontothe hub in making required adjustments of the spindle.

For the purpose of guiding the spindles 16 the lower portion of each isarranged to move freely in a sleeve or box 24, pivotally supported in aclamp 25, that is swiveled to the periphery of the lower spider-frame 5,as shown in Fig. 1. It will be seen from the drawings that eachspider-frame is provided with a number of the boxes 20 and 24,respectively, for supporting and guiding the several rotary andvertically-slidin g spindles.

There is provided on each spindle 16, between the boxes 20 and 24, a boxor sleeve 26, held loosely on the spindle by means of collars 27 and 28,one at each box end. To each of these boxes or sleeves 26 is pivotallyconnected one end ot a lever 29, the other end of which is hinged orpivoted to a fulcru1nlink 30, that is in its turn pivoted to a collar31, secured on the central column or standard 4, from which all thesurrounding spindles are supported. The lever 29 is pivotally connected,near. the sleeve or box 26, to the long member 32 of a knuck1e-jointedlever, that has its short lower member 33 fulcrumed to the peripheralportion of the lower spiderframe 5, so that the said knuckle-lever 32 33when extended or thrown intoa straight line will raise, the spindle 1.6through the connection of the lever 29 with said spindle. A handlever34:, secured to the lower member 33 of the knuckle-joint lever, providesthe means for extending the knuckle'jointed lever and raisin gthespindle. There is secured to the spindle 16,.between the boxes 20 and26, a collar 35,.that is adapted to come in contact with the lower endof the hub 19 of the friction-wheel 15-and' thereby lift saidfriction-wheel away from. engagement with the large centralfriction-wheel 14 when the hand-lever 34 is thrown down in raising thespindle. The collars 35 on the several. spindles are so located withrelation to the boxes 20 and 26 as to afford ample range ofvertically-sliding movement for the spindles when at work withoutinterferin g with rotation of the spindle or spindles through engagementof the friction-wheels; but when. any spindle is raised to its fullheight the collar 35 will lift the box 20 and connected friction-wheel15 until the links 22 are carried to a horizontal position and thefrictionrwheels are thrown out of gear, thereby arresting rotation ofthe spindle, as when required for adjusting or emptying the tap. Bythrowing down the hand-lever 34., thereby extending the lever members 32and 33, the spindle will be raised and held motionless untilitsoperationis again required, and the spindlecan then be lowered and set'inrotation; by raising the hand-lever 3i, and consequently breaking theextension of the connected knuckle-jointed lever. Thus any one or moreof the spindles can be stopped or started, as required, and any spindlecan be raised when necessary to receive more nuts as the workprogresses.

It is preferable to make the annular basin 1 in the form of an invertedtruncated pyramid in cross-section, as shown in Fig. 1, or with inclinedor flaring sides and of suitable dimensions to receive the taps or othertools when at work. The basin is made sufficiently tight to hold anylubricant that it may be desired to use in nut-tapping or other work towhich the machine is adapted, and the basin should be kept sufficientlysupplied with lubricant to cover the work being operated upon.

To the top of the outer wall of the basin 1 there are secured at properintervals a series of grooved and inclined guideways 36 for conductingnu ts or like pieces of work to the taps or other tools. The groovedchannel of each inclined guideway or race may be filled with nuts toslide down, one after another, to the tap, and the race maybe so formedas to hold the nut from turning while the screw-thread is being on t.The upper end of each inclined guideway 36 may have secured thereto a.small pan 37 for holding the nut-blanks temporarily, as a convenienceonly.

The operation of the machine will be readily understood, and it will beobvious that by means of suitable tools carried by the severalindependent and frictionally-operated spindles several different kindsof work can be carried on either separately or simultaneously.

hat I claim as my invention is 1. In a machine for nut tapping, drillingor boring, the combination of a central support having mounted thereon amain frictionwheel and its driving mechanism, a gang of rotary andvertically sliding tool-spindles supported from and surrounding the saidcentral support, friction-wheels feathered on said spindles and adaptedto be engaged with or disengaged from said main central frictionwheel,swiveled guides for the spindles, and lever mechanism for raising andlowering the said spindles independently, substantially as described.

2. In a machine for nut tapping, drilling or boring, the combination ofa central standard having upper and lower spider-frames secured thereon,a gang of rotary and vertically-sliding spindles surrounding saidspider-frames, boxes or sleeves pivotally connected with said frames toreceive, support and guide the said.

.wheel and its driving-gears, agang of rotary and vertically-slidingtool-spindles surrounding the said central support and each havingin-sliding connection therewith a frictionwheel adapted to be engagedwith or disengaged from the main central friction-wheel,

pivotally-supported boxes or sleeves to receive, support and guide thespindles, a collar on each spindle below its upper box or sleeve, andlever mechanism connected with the central support and with each spindlebetween its said collar and the lower spindle box or sleeve, the saidlever mechanism adapted to raise and lower the spindles independentlyand to cause engagement of their frictionwheels with or disengagementfrom the main central friction-wheel, substantially as described.

4. In a machine for nut tapping, drilling or boring, the combination ofa central support, a main friction-wheel and its driving-gears mountedon said support, a gang of independently rotary and vertically-slidingtool-spindles surrounding the said central support and each providedwith a friction-wheel adapted to be engaged with or disengaged from themain central friction-wheel, each frictionwheel on the spindles beingadapted to permit vertical movement of the spindles without conflictingwith their rotation, lever mechanism for raising and lowering thespindles independently, an'annular basin for lubricant below thespindles, and guideways to convey nut-blanks or like work to the tools,substantially as described.

In testimony whereof I have hereunto set my hand in presence of twosubscribing wit,-

nesses.

RUFUS G. MARCY. Witnesses:

I. J. HANMER, TILLIAM H. BRILLBART.

